Dewpointer Опции

[Andrejka]

Hi, I found a schematic of simple temperature, huminidity and dewpoint measuring cicruit. Originally device uses: Sht11 sensor, AT90S8535 MCU, and HD44780 like 20x4 LCD. In my project I replace Sht11 with Sht15 (from Sparkfun), At90s8535 is replaced with newer Atmega8535 (Atmel datasheets say - this is a at90s8535 direct repalcement). But this device working incorrectly, so I have only "Sht11 Monitor" label on LCD, without sensor readings. If possible please help me with source code.

Source project:







URL:
Source project - http://www.embedtronics.com/sht11/sht11.html
Source code - http://www.embedtronics.com/sht11/shtdemo1.c
Schematic - http://www.embedtronics.com/sht11/SHT11Sch.pdf


My device show only this label:



I tried to simulate device in Proteus simulator but this program show the same screen, without sensor readings, only label.


Thank You!

[B0SC0]

I, too, am working on this project and have a problem.

I am using original code, Codevision to compile, AT90S8035-8JI 44 PIN PLCC, 4mhz crystal
20X4 LCD HITACHI COMPATIBLE W/backlight 16 pin connector, SHT11,
PCB that I created.
I have verified all voltages, crystal running at 4 mhz okay.

The problem I am having is the LCD. All character 20x4 are full on blocks. No data. LCD connected to atmel PC0-PC2(lcd pins 4-6) + PC4 - PC7 port(lcd pins 11-14).
In codevision I set the lcd for 20 characters and 4mhz. What other settings do I need to make to at least to get the lcd working right?
I believe hardware is okay, but firmware is not correct.